Stop walking across a dark room to turn on the light. Install a 3-way switch and control lights from two locations.

Here’s how a single-pole switch is typically wired: The electrical box usually has two two-wire cables coming into it.

Replacing a light switch is an easy task for most DIYers, but safety is most important. This guide explains how to get the job done safely and effectively.

Below, Donnelly tells AD how to wire a light switch with this simple step-by-step process for a single-pole light switch without zapping yourself along the way.